Process for preparing polyolefin fluff using metallocene catalyst
US5283300A · kind A · utility
11Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1990 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Nov 5, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Olefin polymers and copolymers having controlled morphology are prepared by bulk or slurry polymerization using metallocene catalysts in the presence of an alumoxane cocatalyst. Prepolymerization at a temperature of -10.degree. C. to +35.degree. C. during 1.5 to 3.5 minutes is immediately followed by polymerization at 55.degree.-70.degree. C. The fluff has a narrow grain size distribution, a smooth surface and a high bulk density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.